甲壳质─钯加氢催化剂的催化性能研究

本文研究了高分子金属加氢催化剂：甲壳质的钯配合物．（以下简称ＣＴ－Ｐｄ）．实验发现，在常温、常压下，ＣＴ－Ｐｄ配合物能对烯烃、芳香族化合物以及丙烯酸进行高效催化加氢．     

论知识产权法和反不正当竞争法对模仿行为的规整--兼论"两法"的联系与区别

从分析知识产权法和反不正当竞争法对"模仿"的不同规整角度,可以总结出"两法"在对技术创新的保护和激励中,由于各自立法宗旨、保护客体、范围等方面的不同而呈不同的规整范围,则盲从模仿适合由反不正当竞争法来规制.     

A theoretical investigation of the emerging standards for web services

Currently, standards for web services are being developed via three different initiatives (W3C, Semantic web services and ebXML). To the best of our knowledge, no theoretical perspectives underlie these standardization efforts. Without the benefit of a strong theoretical basis, the results, within and across these initiatives, have remained piecemeal. We suggest ‘Language–Action Theories’ as a plausible perspective that can effectively define, assess and refine web services standards. In this paper, we first investigate the existing initiatives to identify commonalities that point to theories of ‘Language–Action’ as an appropriate theoretical basis for web services standards. Next, we adapt work from these theories to develop a comprehensive reference framework for understanding web services standards. Finally, we use this reference framework to assess the three initiatives, and analyze the findings to provide insights for future development and refinement of web services standards.

Memory abilities in action video game players

Action video game players (AVGPs) have been shown to outperform non-action video game players (NVGPs) on tasks of perception and attention. Here we set out to investigate if these benefits also extended to another cognitive domain, memory. In particular, while there is some previous evidence suggesting AVGPs demonstrate better visual short-term memory, it is unclear whether this extends to long-term memory processes or indeed, whether these enhancements are due to memory per se or are instead reflective of changes in speed of processing or strategy. Using four tasks that tap distinct areas of memory processing we found evidence for greater speed of processing and enhanced visual short-term memory in AVGPs and compared to NVGPs. However, we found either equivalent or possibly decreased performance in AVGPs in tasks related to long-term memory access. Furthermore, differences in strategy were noted across tasks, in particular differences in the tradeoff between speed and accuracy, which calls for a closer investigation of how task instructions bias performance in future studies.     

Data Refinement of Remote Procedures

Recently the action systems formalism for parallel and distributed systems has been extended with the procedure mechanism. This gives us a very general framework for describing different communication paradigms for action systems, e.g. remote procedure calls. Action systems come with a design methodology based on the refinement calculus. Data refinement is a powerful technique for refining action systems. In this paper we will develop a theory and proof rules for the refinement of action systems that communicate via remote procedures based on the data refinement approach. The proof rules we develop are compositional so that modular refinement of action systems is supported. As an example we will especially study the atomicity refinement of actions. This is an important refinement strategy, as it potentially increases the degree of parallelism in an action system. Received February 1999 / Accepted in revised form July 2000     

Generating operation specifications from UML class diagrams: A model transformation approach

One of the more tedious and complex tasks during the specification of conceptual schemas (CSs) is modeling the operations that define the system behavior. This paper aims to simplify this task by providing a method that automatically generates a set of basic operations that complement the static aspects of the CS and suffice to perform all typical life-cycle create/update/delete changes on the population of the elements of the CS. Our method guarantees that the generated operations are executable, i.e. their executions produce a consistent state wrt the most typical structural constraints that can be defined in CSs (e.g. multiplicity constraints). In particular, our method takes as input a CS expressed as a Unified Modeling Language (UML) class diagram (optionally defined using a profile to enrich the specification of associations) and generates an extended version of the CS that includes all necessary operations to start operating the system. If desired, these basic operations can be later used as building blocks for creating more complex ones. We show the formalization and implementation of our method by means of model-to-model transformations. Our approach is particularly relevant in the context of Model Driven Development approaches.     

Free viewpoint action recognition using motion history volumes

Action recognition is an important and challenging topic in computer vision, with many important applications including video surveillance, automated cinematography and understanding of social interaction. Yet, most current work in gesture or action interpretation remains rooted in view-dependent representations. This paper introduces Motion History Volumes (MHV) as a free-viewpoint representation for human actions in the case of multiple calibrated, and background-subtracted, video cameras. We present algorithms for computing, aligning and comparing MHVs of different actions performed by different people in a variety of viewpoints. Alignment and comparisons are performed efficiently using Fourier transforms in cylindrical coordinates around the vertical axis. Results indicate that this representation can be used to learn and recognize basic human action classes, independently of gender, body size and viewpoint.     

FLASH中影片剪辑的应用

影片剪辑是Flash动画中的动画,一个影片剪辑就是一个迷你Flash影片。是整个Flash应用程序影片的核心,几乎所有的交互操作都是围绕影片剪辑展开的。要成为一个合格的Flash动画开发设计人员,必须精通影片剪辑。     

Action Recognition Using a Bio-Inspired Feedforward Spiking Network

We propose a bio-inspired feedforward spiking network modeling two brain areas dedicated to motion (V1 and MT), and we show how the spiking output can be exploited in a computer vision application: action recognition. In order to analyze spike trains, we consider two characteristics of the neural code: mean firing rate of each neuron and synchrony between neurons. Interestingly, we show that they carry some relevant information for the action recognition application. We compare our results to Jhuang et al. (Proceedings of the 11th international conference on computer vision, pp. 1–8, 2007) on the Weizmann database. As a conclusion, we are convinced that spiking networks represent a powerful alternative framework for real vision applications that will benefit from recent advances in computational neuroscience.